author | Claus Gittinger <cg@exept.de> |
Mon, 12 Dec 2016 13:38:37 +0100 | |
changeset 4078 | 2ab3356da639 |
parent 2275 | 726c29682fd8 |
child 4208 | 083861c0557e |
permissions | -rw-r--r-- |
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" |
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COPYRIGHT (c) 1994 by Claus Gittinger |
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All Rights Reserved |
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This software is furnished under a license and may be used |
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only in accordance with the terms of that license and with the |
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7 |
inclusion of the above copyright notice. This software may not |
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be provided or otherwise made available to, or used by, any |
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other person. No title to or ownership of the software is |
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hereby transferred. |
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" |
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slightly faster #resources access if there are no resources
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"{ Package: 'stx:libcomp' }" |
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Method variableSubclass:#LazyMethod |
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subclasses of fixed classes are still possible
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instanceVariableNames:'' |
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moved recompilation semaphore from LazyMethod to Method
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classVariableNames:'CompilationFailedSignal' |
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subclasses of fixed classes are still possible
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poolDictionaries:'' |
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subclasses of fixed classes are still possible
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category:'Kernel-Methods' |
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! |
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!LazyMethod class methodsFor:'documentation'! |
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copyright |
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" |
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COPYRIGHT (c) 1994 by Claus Gittinger |
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All Rights Reserved |
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28 |
This software is furnished under a license and may be used |
|
29 |
only in accordance with the terms of that license and with the |
|
30 |
inclusion of the above copyright notice. This software may not |
|
31 |
be provided or otherwise made available to, or used by, any |
|
32 |
other person. No title to or ownership of the software is |
|
33 |
hereby transferred. |
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" |
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! |
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||
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documentation |
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" |
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Instances of LazyMethod are created when doing a lazy autoload. |
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They do not contain any code (neither byte- nor machinecode), but |
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keep their sourcecode only. |
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||
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When executed, these will trigger an error in the VM (noByteCode), |
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which is caught here to create a real method from the receiver, |
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amd re-execute the method. |
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||
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This allows faster loading of code, which will be later compiled |
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when first executed; for classes with a large number of methods, of |
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which only a small subset is actually used, this can also save |
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lots of memory (beside making autoloading faster). |
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[author:] |
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Claus Gittinger |
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[see also:] |
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Autoload |
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" |
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! ! |
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!LazyMethod class methodsFor:'initialization'! |
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initialize |
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CompilationFailedSignal isNil ifTrue:[ |
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Exception classes initialize themself.
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CompilationFailedSignal := InvalidCodeError newSignalMayProceed:true. |
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CompilationFailedSignal nameClass:self message:#compilationFailedSignal. |
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CompilationFailedSignal notifierString:'compilation of lazy method failed'. |
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] |
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! ! |
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!LazyMethod class methodsFor:'Signal constants'! |
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compilationFailedSignal |
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^ CompilationFailedSignal |
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! ! |
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!LazyMethod methodsFor:'compiling'! |
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makeRealMethod |
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"make the receiver a real method; i.e. compile the sourcecode and |
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fill in the bytecode. This must be done in order to execute the receiver." |
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|m| |
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"compile the method" |
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[ |
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m := self asExecutableMethod. |
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] valueUninterruptably. |
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(m isNil |
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or:[(byteCode := m byteCode) isNil |
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and:[m hasCode not]]) ifTrue:[ |
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Move method's literals form literalArray to indexed instvars.
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" |
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Move method's literals form literalArray to indexed instvars.
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compilation failed |
163651658aee
Move method's literals form literalArray to indexed instvars.
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" |
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Move method's literals form literalArray to indexed instvars.
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96 |
^ nil |
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]. |
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Move method's literals form literalArray to indexed instvars.
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self literals:m literals. |
54 | 99 |
flags := m flags. |
126 | 100 |
self code:(m code). |
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self changeClassToThatOf:m. |
102 |
^ self |
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"Created: / 24.10.1995 / 14:02:50 / cg" |
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"Modified: / 24.6.1996 / 17:23:57 / stefan" |
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"Modified: / 13.11.1998 / 23:20:41 / cg" |
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! ! |
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!LazyMethod methodsFor:'error handling'! |
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noByteCode |
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"this is triggered by the interpreter when a lazy method is about to |
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be executed (by sending the to-be executed method this message). |
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Hard-compile the method, install its bytecode in the receiver, |
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and recall it." |
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|sender spec class selector| |
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119 |
"compile the method" |
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self makeRealMethod isNil ifTrue:[ |
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" |
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compilation failed |
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when resending a method after it has been compiled
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parents:
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124 |
" |
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selector := thisContext sender selector. |
45 | 126 |
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class := self containingClass. |
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class notNil ifTrue:[ |
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spec := class name , '>>' , selector |
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] ifFalse:[ |
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spec := 'unknown>>' , selector |
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]. |
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" |
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parents:
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this error is triggered, if the compilation of a lazy method |
0398d8de8242
when resending a method after it has been compiled
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parents:
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failed - this happens for example, if a lazy methods code has been |
0398d8de8242
when resending a method after it has been compiled
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parents:
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changed in a fileBrowser without checking the code for syntactical |
0398d8de8242
when resending a method after it has been compiled
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correctnes, or if the instvars of an autoloaded classes superclass |
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when resending a method after it has been compiled
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parents:
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have been changed without changing the subclasses code ... |
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when resending a method after it has been compiled
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You should enter the SystemBrowser on this method, and try accepting |
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to see what the problem is. |
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when resending a method after it has been compiled
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The methods class is found in the local 'class', |
0398d8de8242
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the selector is found in the local 'selector'. |
45 | 143 |
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parents:
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As a general rule: never edit autoloaded classes from anything |
0398d8de8242
when resending a method after it has been compiled
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except the browser - to check that they work and are compilable. |
0398d8de8242
when resending a method after it has been compiled
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parents:
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" |
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147 |
^ CompilationFailedSignal raiseRequestWith:self |
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errorString:('compilation of lazy method ' , spec , ' failed') |
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]. |
45 | 150 |
|
151 |
" |
|
152 |
Now, the receiver method has mutated into a real (non-lazy) one. |
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153 |
Get the original message receiver and args, and execute the method. |
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155 |
ThisContext sender is the context of the original send (the failed one) |
|
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" |
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sender := thisContext sender. |
45 | 158 |
ObjectMemory flushCaches. |
159 |
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160 |
^ self valueWithReceiver:(sender receiver) |
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arguments:(sender args) |
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selector:(sender selector) |
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search:(sender searchClass) |
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164 |
sender:nil |
18 | 165 |
! ! |
142 | 166 |
|
167 |
!LazyMethod methodsFor:'queries'! |
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169 |
isLazyMethod |
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^ true |
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891 | 171 |
! |
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||
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always return an array from #literals
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literals |
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always return an array from #literals
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174 |
"cannot ask a lazyMethod for literals ..." |
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always return an array from #literals
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|
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always return an array from #literals
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|m| |
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always return an array from #literals
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|
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always return an array from #literals
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(m := self asExecutableMethod) notNil ifTrue:[^ m literals]. |
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always return an array from #literals
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^ #() |
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always return an array from #literals
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! |
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always return an array from #literals
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literalsDetect:aBlock ifNone:exceptionalValue |
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added: #literalsDetect:ifNone:
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"cannot ask a lazyMethod for literals ..." |
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added: #literalsDetect:ifNone:
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|
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added: #literalsDetect:ifNone:
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185 |
|m| |
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186 |
|
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added: #literalsDetect:ifNone:
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(m := self asExecutableMethod) notNil ifTrue:[^ m literalsDetect:aBlock ifNone:exceptionalValue]. |
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188 |
^ exceptionalValue value |
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added: #literalsDetect:ifNone:
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189 |
! |
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190 |
|
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messagesSent |
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192 |
"cannot ask a lazyMethod for messagesSent ..." |
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|
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194 |
|m| |
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195 |
|
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196 |
(m := self asExecutableMethod) notNil ifTrue:[^ m messagesSent]. |
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197 |
^ #() |
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198 |
! |
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199 |
|
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200 |
messagesSentToSelf |
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parents:
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201 |
"cannot ask a lazyMethod for messagesSentToSelf ..." |
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|
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203 |
|m| |
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204 |
|
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added #messagesSentToSelf, toSuper and sent
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205 |
(m := self asExecutableMethod) notNil ifTrue:[^ m messagesSentToSelf]. |
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added #messagesSentToSelf, toSuper and sent
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|
206 |
^ #() |
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added #messagesSentToSelf, toSuper and sent
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|
207 |
! |
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|
208 |
|
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|
209 |
messagesSentToSuper |
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210 |
"cannot ask a lazyMethod for messagesSentToSuper ..." |
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added #messagesSentToSelf, toSuper and sent
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211 |
|
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212 |
|m| |
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|
213 |
|
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added #messagesSentToSelf, toSuper and sent
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|
214 |
(m := self asExecutableMethod) notNil ifTrue:[^ m messagesSentToSuper]. |
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added #messagesSentToSelf, toSuper and sent
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|
215 |
^ #() |
c66b7d5dcc92
added #messagesSentToSelf, toSuper and sent
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parents:
1072
diff
changeset
|
216 |
! |
c66b7d5dcc92
added #messagesSentToSelf, toSuper and sent
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parents:
1072
diff
changeset
|
217 |
|
891 | 218 |
resources |
219 |
"cannot ask a lazyMethod for resources ..." |
|
220 |
||
892 | 221 |
|m| |
222 |
||
1115
ca9303f55111
better resource parsing (without compiling)
Claus Gittinger <cg@exept.de>
parents:
1083
diff
changeset
|
223 |
^ self parseResources. |
ca9303f55111
better resource parsing (without compiling)
Claus Gittinger <cg@exept.de>
parents:
1083
diff
changeset
|
224 |
"/ (self source includesString:'resource') ifFalse:[^ nil]. |
ca9303f55111
better resource parsing (without compiling)
Claus Gittinger <cg@exept.de>
parents:
1083
diff
changeset
|
225 |
"/ |
ca9303f55111
better resource parsing (without compiling)
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parents:
1083
diff
changeset
|
226 |
"/ (m := self asExecutableMethod) notNil ifTrue:[^ m resources]. |
ca9303f55111
better resource parsing (without compiling)
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parents:
1083
diff
changeset
|
227 |
"/ ^ nil |
142 | 228 |
! ! |
229 |
||
799 | 230 |
!LazyMethod class methodsFor:'documentation'! |
249
fb82fccfb779
subclasses of fixed classes are still possible
Claus Gittinger <cg@exept.de>
parents:
190
diff
changeset
|
231 |
|
fb82fccfb779
subclasses of fixed classes are still possible
Claus Gittinger <cg@exept.de>
parents:
190
diff
changeset
|
232 |
version |
2275
726c29682fd8
added: #literalsDetect:ifNone:
Claus Gittinger <cg@exept.de>
parents:
1452
diff
changeset
|
233 |
^ '$Header: /cvs/stx/stx/libcomp/LazyMethod.st,v 1.35 2009-11-13 09:55:39 cg Exp $' |
726c29682fd8
added: #literalsDetect:ifNone:
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parents:
1452
diff
changeset
|
234 |
! |
726c29682fd8
added: #literalsDetect:ifNone:
Claus Gittinger <cg@exept.de>
parents:
1452
diff
changeset
|
235 |
|
726c29682fd8
added: #literalsDetect:ifNone:
Claus Gittinger <cg@exept.de>
parents:
1452
diff
changeset
|
236 |
version_CVS |
726c29682fd8
added: #literalsDetect:ifNone:
Claus Gittinger <cg@exept.de>
parents:
1452
diff
changeset
|
237 |
^ '$Header: /cvs/stx/stx/libcomp/LazyMethod.st,v 1.35 2009-11-13 09:55:39 cg Exp $' |
249
fb82fccfb779
subclasses of fixed classes are still possible
Claus Gittinger <cg@exept.de>
parents:
190
diff
changeset
|
238 |
! ! |
1450 | 239 |
|
142 | 240 |
LazyMethod initialize! |